Samsung has done a good job with the Galaxy S5. Software bloat has been pared down and a few useful new features added, while the technical specifications are superb and battery life is good. Design purists may bemoan the plastic chassis, but the Galaxy S5 is still a worthy successor to last year's model.

The line between tablet and PC used to be well defined. Increasingly, though, that distinction is being blurred as tablets become capable of more powerful business tasks and as PCs become more mobile. And then there's the fastest-growing category of all.